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Use Cases (15.- System:
A conceptual entity defined by
its boundaries.…
Use Cases
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1.- Actors:
In UML, someone or something outside the system that interacts with the system.
2.- Alternate flow:
The part of a use case that describes its alternative implementations. It´s also used to describe error conditions, since errors can be considered a kind of alternative. Also called alternate path
3.- Association:
In UML, a relationship between an actor and a use case that indicates that the actor interacts whit the system.
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5.- Constraint:
A semantic condition or restriction that describes a limitation or state of the use case.
6.- Extend:
In UML, a relationship from an extendinguse case to a base use case specifying how the behavior definied for the extending use case can be inserted into the other use case
7.- Include:
In UML, specifying how the behavior definied for the included use case can be insetred into the base use case
8.- Model:
A semantically closed abstraction of a system or a complete description of a system from a particular perspective.
9.- Object Management Group (OMG):
An international standards organization that owns and maintains CORBA and UML standards.
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12.- Relationship:
A semantic connection between model elements. Relationships to use cases include association,extend and include
13.- Requirement:
A condition or capability to which a system must conform. are either derived from user needs or stated in a contract imposed document.
14.- Scenario:
A description of a specific sequence of actions. In use case scenarios, specific persons or actor instances replace actors.
16.- Unified Modeling Language (UML):
graphical language for visualizing, specifying, constructing, and documenting an object-oriented software-intensive system’s artifacts.
17.-Use case in UML:
a complete task of a system that provides a measurable result of value for an actor.
18.-Use case Diagram:
A UML diagram that shows actors, use cases, and their relationships.
19.- Use case Model:
A model that describes a system’s functional requirements in terms of use cases.
20.- Use case Specification:
A document that describes a use case. A use case specification’s fundamental parts are the use case name
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